Molding-machine.



LL J. MONAHAN & R. ZIEBELL MOLDING MACHINE. APPLIOATION FILED AUG. 16, 1911. 1,029,079, Patented June 11-, 1912.

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I I 3 1 l l 1 I !'E n i i 'i f i 5 I O I IIZA witnesses: I Inventors coumam PLANOGRAPH co.,wAsr4ma1-ou, n. cl

L. J. MONAHAN & R. ZIP-BELL.

MOLDING MACHINE.

APPLICATION FILED AUG.16, 1911.

Patented June 11, 1912.

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wi nesses COLUMBIA PLANoRAPH CO-"WASHINGTON. D. c;

L. J. MONAHAN & R. ZIEBELL.

MOLDING MACHINE. APPLICATION TILED AUG.16, 1911.

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v Patented June 11,1912.

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NouRAPH CO.,WASHINUTON n c L. J. MONAHAN & R. ZIEBELL.

MOLDING MACHINE.

APPLIOATION FILED AUG. 16, 1911.

Patented June-11 4 sums-sum 4.

ln uentov s COLUMBIA PLANOURAPH 60.,WASHINOTON. D. 1..

C0111: ess s- LOUIS J. MONAHAN AND ROBERT ZIEBELL, F 'OSHKOSH, WISCONSIN.

MOLDING-MAGHINE.

Specification of Letters Patent.

Application filed August 16, 1911.

Patented June 11, 1912.

Serial No. 644,471.

To all whom it may concern- Be it known that we, LoUIs J. MONAHAN and ROBERT ZIEBELL, citizens of the United States, residing at Oshkoslnin the county of Winnebago and State of Wisconsin, have invented certain new and useful Improvements in Molding-Machines, of which the following is a specification.

This invention relates to a new machine for green sand molding and has special reference to the making of gasolene engine piston molds, the object being to produce the molds and castings without the use of dry sand cores, a further object being to produce a uniform castingttrue to pattern.

In the drawings, Figure 1, shows a section of the cope part of the machine; Fig.

2, the same view with the pattern lowered; F1g. 3, an outside view of the same machlne,

and Fig. 4 shows a complete mold ready.

for pouring which is composed ofa cope as made on the machine shown herewith and a suitable drag.

The numeral (1) is a plate with atrue top surface, and has a large hole in its center, and also has two pins (3) secured,

or fitted thereinto. Lugs (4) are cast on the plate and holes bored therethrough. A foot plate (5) is provided with suitable feet and has two lugs (6) cast thereon, and steel rods (7 are fitted into the lugs (4) and (6) which makes a com plete frame. A bracket (8) with bearings (9) fitted to slide on the rods (7) is arranged with lugs (10), a connecting rod (11), crank arm (12), and shaft The shaft is fitted in suitable bearings (14) and has a lever (15) secured to one end thereof, so that a movement of the lever will cause the bracket (8) to slide on the rods (7). A spring (16) is provided to lock the lever in a given position. A suitably formed piston pattern (17) is secured to the bracket (8) and bored out to the form, to produce the shape of core desired. Extending bosses (18) are cast with the pattern which are bored out as shown. Sliding plugs (19) are fitted into the said bore, so they will easily slide therein and are tapered at the inner ends to suit the style of lug desired in the casting. A lever (20') is pivoted in a bracket (21) which is secured to i the bracket (8) and has a handle (22). One end of said lever is pivoted to one of the plugs (19) and the lever end is connected with the other plug by means of links (23) so that a movement of the lever (22) will cause the plugs to slide into or out of the inside of the pat-tern. A spring (24) is attached to the'bracket to retain the lever (20) in a fixed position. A stripping plate (25) is mounted rigidly on a post (26) and fitted into the piston pattern for the purpose of holding the sand in place while the pattern is drawn down. A cope part of the flask (27) with lugs (28) is fitted to the pins (8), which is arranged so the center of the pattern is exactly centered between the pins; the cope has handles (29) for lifting same off the machine.

In Fig. 2, the sand is shown in place in the cope after the pattern has been drawn and a gateway (30) is formed in the sand for pouring in the metal.

A pattern can be attached to the machine in Fig. 1, and a drag flask used on top, but it is more convenient to have two machines to save adjusting the pattern for each half of the mold.

The numeral (32) indicates a drag or lower part of a flask in position with the cope or top part and (34) indicates a gate into which the metal is poured.

The operation is as follows :The drag is first rammed up by setting on the flask, and

setting the pattern to the top as shown; when the sand is rammed into the flask the lever is drawn down which draws the pattern clear through the board (1) leaving its imprint in the sand, the plate (1) keeping the sand in place; the flask is now lifted off, turned over and set on a bottom board (35) Fig. 4. After a suificient number of drags are finished the cope machine is set up as shown in Fig. 1 with the pattern at the top and plugs (19) set clear in, the flask (2 is set on and the sand rammed thereinto; a gate stick being set to form the pouring gate (30). After the flask is rammed up, the plugs (19) are pulled out by means of the lever (22), the pattern acting to strip the sandand retain it in place; next the lever (15) is pulled down drawing the pattern (17) down and away from sand. The flask containing the sand form is lifted off, and set on the drag forming the mold as shown in Fig. 4 which is ready to pour.

It will be seen that the method not only saves considerable time over the method of making dry cores, but produces a much more satisfactory casting, being smoother inside and true to size in all parts.

It will be seen the machine can be used for a variety of molding operations where compleX castings are produced and without the aid of dry sand cores and while the drawings show a type of machine adapted to the molding of a certain form of gasolene engine piston, it is obvious that a number of pistons can be made on one'machine at the same time by adding more patterns or the machine can be easily arranged for other intricate work and We do not wish to be limited to this particular process and construction.

What we claim and desire to secure Letters Patent is 1. A piston molding machine comprising a suitable supporting frame having a stripping plate arranged horizontally at the top, a bracket arranged to slide vertically below the stripping plate, a suitably formed open piston pattern attached to the bracket and having cross holes therethrough plugs fitted to slide a limited distance in said cross holes and to pass a limited distance into the open portion of the pattern end stripping posts fitted into the lower end of the pattern and secured rigidly to the frame, means for sliding the plugs outwardly and means for sliding thepattern downward around th posts. i

2. In a piston molding machine the combination with a supporting frame having a stripping plate fitted to the top thereof and having a pattern hole therethrough, a vertically sliding bracket having an open or hollow piston pattern secured thereto, said pattern having the holes therethrough horizontally, suitably formed plugs fitted to slide through the said holes to form impressions in the sand inside the pattern, a post secured to the frame and fitted into the pattern to form the bottom thereof, means for sliding the plugs outwardly and means for locking the pattern in its upper position.

In testimony whereof we afiEiX our signatures in presence of two witnesses.

LOUIS J. MONAHAN. ROBERT ZIEBELL. Witnesses:

W. W. WATERHOUSE, OTTO KONRAD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C." 

